Question

why should magnesium ribbon be cleaned before burning in air ?​

Answer 1

Answer:

To remove the Magnesium oxide layer from the ribbon which may prevent or slow down the burning of magnesium ribbon.

Explanation:

Unwanted impurities deposited on the magnesium ribbon can be removed and only pure magnesium can be used for the reaction.

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Answer 2

Magnesium ribbon should be cleaned before burning air to remove the magnesium oxide layer from the ribbon which may prevent or slow down the burning of magnesium ribbon.

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